The first does not work because "good" is an adjective. The sentence needs a noun: "I will always want goodness for you". That works, but it is not the best way to express the sentiment. It would be better to want "good fortune" or "good things". Also, "wish" would be better than "want". Here's a better way: "I will always wish for good fortune to come your way." Your second sentence is good but would be better if you said "I WILL always wish you well" That is because "will" magnifies your intention. It is not because "will" places the action in the future.